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【Daily Topic】【Electrical Edition 20170317】

2017-03-17View Original

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Participation reward: 2 Wealth. Correct reward: 8 Wealth. Multiple-choice question: If a DC motor is not equipped with weak-field protection, then the occurrence of weak field during operation of the motor will lead to ( ). A. Motor burnout due to overcurrent B. Insulation breakdown due to overvoltage in the motor C. Drop in grid voltage D. Motor running away unexpectedly D

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